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Issue 29, 2015
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The role of curvature anisotropy in the ordering of spheres on an ellipsoid

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Abstract

Non-spherical emulsion droplets can be stabilized by densely packed colloidal particles adsorbed at their surface. In order to understand the microstructure of these surface packings, the ordering of hard spheres on ellipsoidal surfaces is determined through large scale computer simulations. Defects in the packing are shown generically to occur most often in regions of strong curvature; however, the relationship between defects and curvature is nontrivial, and the distribution of defects shows secondary maxima for ellipsoids of sufficiently high aspect ratio. As with packings on spherical surfaces, additional defects beyond those required by topology are observed as chains or “scars”. The transition point, however, is found to be softened by the anisotropic curvature which also partially orients the scars. A rich library of symmetric commensurate packings are identified for low particle number. We verify experimentally that ellipsoidal droplets of varying aspect ratio can be arrested by surface-adsorbed colloids.

Graphical abstract: The role of curvature anisotropy in the ordering of spheres on an ellipsoid

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Publication details

The article was received on 08 May 2015, accepted on 16 Jun 2015 and first published on 17 Jun 2015


Article type: Paper
DOI: 10.1039/C5SM01118C
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Citation: Soft Matter, 2015,11, 5872-5882
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    The role of curvature anisotropy in the ordering of spheres on an ellipsoid

    C. J. Burke, B. L. Mbanga, Z. Wei, P. T. Spicer and T. J. Atherton, Soft Matter, 2015, 11, 5872
    DOI: 10.1039/C5SM01118C

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